Brake lever turning device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHUZHOU KANGDA FORKLIFT ACCESSORIES MFG CO LTD
- Filing Date
- 2025-09-15
- Publication Date
- 2026-08-07
AI Technical Summary
[0003]但是制动杆的结构不规则，且局部空心，车削常使用三爪卡盘进行夹持使用，但是不规则的制动杆使得三爪卡盘难以找到稳定的全域定位基准，攻丝时螺纹孔与折弯段的位置度，极易超差，会干扰夹具的贴合面，使夹持点无法完全接触，同时存在固定结构三爪卡盘的挤压夹持力度小时会因为攻丝力度大导致制动杆偏移，夹持力度大时，又会因为车削的力度和夹持时的过载夹持力导致空心结构处变形，传统的固定结构难以适应制动杆的车削加工
[0013]相比于现有技术，本实用新型的优点在于：
Smart Images
Figure CN224601091U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of turning device technology, and in particular to a brake lever turning device. Background Technology
[0002] In traditional brake lever design, threaded holes are mainly used to achieve detachable connections between components, such as bolt fixing to brackets, pedals, or actuators. Threaded holes require multiple processes such as drilling and tapping.
[0003] However, the brake lever has an irregular structure and is partially hollow. While a three-jaw chuck is commonly used for clamping during turning, its irregular shape makes it difficult for the chuck to find a stable global positioning reference. During tapping, the positional accuracy of the threaded hole and the bent section is prone to exceeding tolerances, interfering with the clamping surface and preventing complete contact at the clamping points. Furthermore, with a fixed three-jaw chuck, a small clamping force can cause the brake lever to shift due to excessive tapping force, while a large clamping force can cause deformation of the hollow structure due to turning forces and overload clamping. Traditional fixed structures are ill-suited for turning brake levers. Therefore, those skilled in the art have provided a brake lever turning device to solve the problems mentioned in the background. Utility Model Content
[0004] Technical solution
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a brake lever turning device, comprising a motor, a mounting bracket, a hydraulic rod, a brake lever body, a positioning cylinder, a guide rod, and a support plate. A motor is mounted on one side of the upper end of the mounting bracket, and a screw is mounted on the output end of the motor. A threaded bracket is threadedly fitted onto the outer wall of the screw, and a hydraulic rod is housed inside the threaded bracket. A fixed bracket is fitted onto the outer wall of the hydraulic rod, and a positioning cylinder is housed inside the fixed bracket. A connecting block is mounted on one end of the hydraulic rod, and a guide rod is mounted on one end of the connecting block. Symmetrically distributed tapered columns with gradually increasing outer diameters are fitted onto the outer wall of the guide rod. Two sets of inner support blocks arranged in a circular array are mounted on the inner wall of the positioning cylinder. A support plate arranged in a circular array is slidably mounted on the outer wall of the positioning cylinder. Springs are installed between the support plates and the inner support blocks. The brake lever body is fitted onto the outer side of the positioning cylinder.
[0006] Furthermore, one end of the positioning cylinder is tapered, and an assembly groove is provided inside one end of the brake lever body. The positioning cylinder is inserted into the assembly groove through the tapered end, and an assembly hole is machined inside the brake lever body. Specifically, the positioning cylinder is inserted before positioning when machining or tapping the assembly hole of the brake lever body.
[0007] Furthermore, a guide rail is provided on one inner wall of the mounting bracket, a support rod is provided at the lower end of the threaded bracket, and a slider that is slidably installed inside the guide rail is provided on one side of the lower end of the support rod; Specifically, the slider slides inside the guide rail, and the threaded bracket receives lateral sliding support through the support rod and the slider, thus providing lateral sliding guidance for the threaded bracket.
[0008] Furthermore, the inner walls of both the front and rear sides of the slider are rotatably equipped with equally spaced ball bearings, and the inner walls of both the front and rear sides of the guide rail are provided with roller grooves. The ball bearings are rolled and fitted into the inner wall of the roller grooves. One end of the mounting bracket is provided with an electromagnetic brake that is sleeved on the outside of the motor output end. Specifically, the ball bearings roll inside the groove, reducing the resistance of the slider's sliding motion, and the electromagnetic brake fixes the unused motor output end.
[0009] Furthermore, symmetrically distributed reinforcing ribs are provided between the guide rail and the mounting bracket, a bearing bracket is provided at one end of the mounting bracket, one end of the screw is rotatably installed inside the bearing bracket, and symmetrically distributed mounting grooves are provided inside the mounting bracket. Specifically, the connection strength between the guide rail and the mounting bracket is improved by reinforcing ribs, and the screw is supported by the bearing bracket when it rotates, so that the screw rotates stably as a whole. The mounting groove is used to fix the parts.
[0010] Furthermore, the lower end of the support plate is provided with symmetrically distributed positioning tubes located inside the spring, and a positioning rod connected to the inner support block is slidably inserted into the lower end of the positioning tubes. Specifically, the positioning rod slides inside the positioning cylinder to guide the telescopic spring, preventing it from shifting outward and ensuring stable longitudinal extension and contraction.
[0011] Furthermore, the inner wall of the support plate is provided with two sets of positioning blocks, and the inner wall of the positioning blocks is rotatably mounted with ball bearings located on the moving path of the conical column; Specifically, because the positioning block is connected to the support plate, the force arc of the second ball bearing acts on the support plate through the positioning block, thereby reducing the friction and resistance when the conical column passes through.
[0012] Beneficial effects
[0013] Compared with existing technologies, the advantages of this utility model are: This invention utilizes an insertable internal support positioning cylinder inserted into the hollow structure of the brake lever body to support the inner wall of the brake lever body. After the positioning cylinder is positioned inside the brake lever body, the telescopic end of the hydraulic rod moves inside the positioning cylinder, acting as a guide rod. A tapered column presses against the support plate, providing multi-point support to the inner wall of the brake lever body's mounting groove, thus fixing the brake lever body. Simultaneously, it supports the inner wall of the hollow structure of the brake lever body. When machining the mounting hole, the moving rod body is fixed, and the compressive force acting on the inside of the moving rod body during machining, drilling, and tapping prevents deformation of the hollow structure. It also avoids the problem of an unstable front end from a three-jaw chuck, adapts to the irregular shape of the moving rod body, and facilitates stable machining through a suitable fixture structure.
[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a front-view three-dimensional structural diagram of the present invention; Figure 2 This is a front-view three-dimensional structural diagram of the brake lever body of this utility model; Figure 3 This is a side-view perspective view of the mounting bracket of this utility model. Figure 4 This is a top-view three-dimensional structural diagram of the mounting bracket of this utility model; Figure 5 This is a front-view three-dimensional structural diagram of the guide rod of this utility model; Figure 6 This is a top view of the three-dimensional structure of the support plate of this utility model; Figure 7 This is a side sectional three-dimensional structural diagram of the support plate of this utility model.
[0017] The attached diagram lists the components represented by each number as follows: 1. Motor; 2. Mounting bracket; 3. Guide rail; 4. Screw; 5. Hydraulic rod; 6. Brake rod body; 7. Electromagnetic brake; 8. Bearing bracket; 9. Positioning cylinder; 10. Mounting groove; 11. Reinforcing rib; 12. Assembly groove; 13. Assembly hole; 14. Slider; 15. Ball bearing 1; 16. Support rod; 17. Fixed bracket; 18. Connecting block; 19. Guide rod; 20. Tapered column; 21. Roller groove; 22. Threaded bracket; 23. Support plate; 24. Positioning block; 25. Ball bearing 2; 26. Inner support block; 27. Spring; 28. Positioning tube; 29. Positioning rod. Detailed Implementation
[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Example
[0022] Please see Figure 1-7As shown, this embodiment is a brake lever turning device, including a motor 1, a mounting frame 2, a hydraulic rod 5, a brake lever body 6, a positioning cylinder 9, a guide rod 19, and a support plate 23. The motor 1 is provided on one side of the upper end of the mounting frame 2. A screw 4 is provided at the output end of the motor 1. A threaded bracket 22 is threadedly installed on the outer wall of the screw 4. The hydraulic rod 5 is provided inside the threaded bracket 22. A fixed bracket 17 is sleeved on the outer wall of the hydraulic rod 5. The positioning cylinder 9 is provided inside the fixed bracket 17. A connecting block 18 is provided at one end of the hydraulic rod 5. A guide rod 19 is provided at one end of the connecting block 18. A tapered column 20 with symmetrical distribution and gradually increasing outer diameter on one side is sleeved on the outer wall of the guide rod 19. Two sets of inner support blocks 26 arranged in a ring array are provided on the inner wall of the positioning cylinder 9. A support plate 23 arranged in a ring array is slidably installed on the outer wall of the positioning cylinder 9. A spring 27 is provided between the support plate 23 and the inner support block 26. The brake lever body 6 is sleeved on the outer side of the positioning cylinder 9. One end of the positioning cylinder 9 is tapered, and one end of the brake lever body 6 has an assembly groove 12. The positioning cylinder 9 is inserted into the assembly groove 12 through the tapered end. The brake lever body 6 has an assembly hole 13 machined inside. A guide rail 3 is provided on one side of the inner wall of the mounting bracket 2, and a support rod 16 is provided at the lower end of the threaded bracket 22. A slider 14 is slidably installed inside the guide rail 3 on one side of the lower end of the support rod 16. The inner walls of the front and rear sides of the slider 14 are rotatably installed with equally spaced ball bearings 15. The inner walls of the front and rear sides of the guide rail 3 are provided with roller grooves 21. The ball bearings 15 are rolled and fitted into the inner wall of the roller grooves 21. One end of the mounting bracket 2 is provided with an electromagnetic brake 7 that is sleeved on the outside of the output end of the motor 1. Symmetrically distributed reinforcing ribs 11 are provided between the guide rail 3 and the mounting bracket 2. One end of the mounting bracket 2 is provided with a bearing bracket 8, and one end of the screw 4 is rotatably installed inside the bearing bracket 8. Symmetrically distributed mounting grooves 10 are provided inside the mounting bracket 2. The lower end of the support plate 23 is provided with symmetrically distributed positioning tubes 28 located inside the spring 27, and the lower end of the positioning tubes 28 is slidably inserted with positioning rods 29 connected to the inner support block 26. The inner wall of the support plate 23 is provided with two sets of positioning blocks 24, and the inner wall of the positioning blocks 24 is rotatably mounted with balls located on the moving path of the cone column 20. In this embodiment, the power source of the device is divided into feeding power and clamping power. The feeding power is provided by motor 1. Motor 1 is a three-phase asynchronous motor. The outer shell is made of gray cast iron HT200, which has good heat dissipation and vibration resistance. The output end of motor 1 is connected to screw 4, which is made of 40Cr steel. It is heat treated and chrome-plated to improve wear resistance. When screw 4 rotates, it drives the threaded bracket 22 with the threaded sleeve on the outer wall to move laterally. The threaded bracket 22 is made of Q235 steel and welded to ensure torsional rigidity. The clamping power is provided by hydraulic rod 5. The cylinder of hydraulic rod 5 is made of 20 seamless steel pipe. The inner wall is honed to Ra0.4μm to reduce hydraulic oil leakage. The piston rod is made of 40Cr steel with a chrome-plated layer thickness of 0.05~0.1mm, which is rust-proof and wear-resistant. One end of hydraulic rod 5 is connected to guide rod 19 through connecting block 18. Both connecting block 18 and guide rod 19 are made of 45 steel. The outer wall of guide rod 19 is sleeved with symmetrically distributed conical columns 20 to reduce frictional resistance during extrusion. The brake lever body 6 is stably fixed by the inner top and outer clamp, which is suitable for its hollow and irregular structure. The positioning cylinder 9 is made of 45 steel and one end is designed as a cone with a surface roughness of Ra3.2μm, which facilitates insertion into the brake lever assembly slot 12. The inner wall is provided with two sets of annular array of inner support blocks 26. The support blocks are made of HT300 wear-resistant cast iron and the surface is aged to eliminate internal stress and prevent breakage during support. The inner support blocks 26 and the support plate 23 are made of Q235 steel and are guided by the positioning rod 29 and the positioning tube 28. The support plate 23 and the inner support blocks 26 are connected by a spring 27. The spring 27 is made of 65Mn steel and is isothermally quenched, with a high elastic limit, and does not fatigue during long-term expansion and contraction. When the hydraulic rod 5 pushes the guide rod 19 forward, the cone column 20 rolls along the inner wall of the positioning block 24 with the second ball 25. The second ball 25 is made of GCr15 bearing steel. The pressure support plate 23 drives the inner support block 26 to push outward against the hollow section of the inner wall of the brake rod body 6. When the pressure on the inner side of the support plate is released, the support plate 23 is reset under the tension of the spring 27. The support rod 16 connected to the lower end of the threaded bracket 22 is made of 45 steel. The slider 14 at the lower end of the support rod 16 is made of 45 steel with quenching treatment. The embedded guide rail 3 is made of 45 steel with overall quenching and the surface is ground to Ra0.4μm. A groove 21 is opened to install the first ball 15. The first ball 15 on the front and rear sides of the slider 14 is made of GCr15 bearing steel and rolls in the groove 21, changing the sliding friction into rolling friction and reducing the feed resistance and wear of the guide rail 3. A reinforcing rib 11 is welded between the guide rail 3 and the mounting bracket 2. The reinforcing rib 11 is made of Q235 steel with a right-angled triangular cross section to improve the bending resistance of the guide rail 3. One end of the screw 4 is supported by a bearing bracket 8, which is made of HT200 cast iron and has a built-in deep groove ball bearing 6205 to prevent radial movement of the screw 4 during rotation. The electromagnetic brake 7 set at one end of the mounting bracket 2 has an outer shell of HT150 cast iron and an internal coil of enameled copper wire. When the power is off, the output end of the motor 1 can be locked by electromagnetic force to prevent the threaded bracket 22 from sliding accidentally. The clamping power is driven by a hydraulic rod. Select the brake rod body 6 to be processed, align the assembly groove 12 at one end of the brake rod body 6 with the conical end of the positioning cylinder 9, and slowly push the brake rod until the conical end of the positioning cylinder 9 is fully inserted into the bottom of the assembly groove 12. At this point, the hollow section of the brake rod body 6 is fitted onto the outside of the positioning cylinder 9. Connect the hydraulic system power supply and set the working pressure of the hydraulic rod 5 to 0.8-1.2 MPa, adjusted according to the brake rod material. For brake rod body 6 made of 20# steel, a pressure of 1.0 MPa is used. -1.2MPa, the brake lever body 6 made of 6061 aluminum alloy is 0.8-1.0MPa to avoid excessive pressure causing deformation of the hollow section. The piston rod of the hydraulic rod 5 extends and drives the guide rod 19 and the cone column 20 to move forward through the connecting block 18. The cone column 20 squeezes the ball bearings 25 on the support plate 23 and pushes the inner support block 26 to move radially outward along the positioning tube 28 until the inner support block 26 is completely pressed against the hollow section of the inner wall of the brake lever body 6. The assembly hole 13 is machined according to the brake lever requirements. The motor 1 is started, and the screw 4 drives the threaded bracket 22 to feed laterally along the guide rail 3. During the processing, the electromagnetic brake 7 is in standby mode. If it needs to be paused, the electromagnetic brake 7 will immediately lock the motor 1 shaft after the power is cut off to prevent the threaded bracket 22 from retracting. After the processing is completed, the motor 1 and the hydraulic system are turned off, the piston rod of the hydraulic rod 5 retracts, the cone column 20 releases the pressure on the support plate 23, and the support plate 23 retracts under the action of the spring 27, contacting the support on the inner wall of the brake rod body 6. The brake rod body 6 is slowly taken out. Traditional three-jaw chucks are prone to deformation of the hollow section of the brake rod due to small clamping force and large force. The conical end of the positioning cylinder 9 can be adapted to the brake rod assembly slot 12 within a certain radius specification. There is no need to redesign the fixture when changing the brake rod body 6 of different sizes and models, which improves the flexibility of use.
[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A brake lever turning device, characterized in that: The system includes a motor (1), a mounting bracket (2), a hydraulic rod (5), a brake rod body (6), a positioning cylinder (9), a guide rod (19), and a support plate (23). The mounting bracket (2) has a motor (1) on one side of its upper end. A screw (4) is installed at the output end of the motor (1). A threaded bracket (22) is threaded onto the outer wall of the screw (4). A hydraulic rod (5) is installed inside the threaded bracket (22). A fixed bracket (17) is fitted onto the outer wall of the hydraulic rod (5). A positioning cylinder (9) is installed inside the fixed bracket (17). The hydraulic rod... (5) A connecting block (18) is provided at one end, and a guide rod (19) is provided at one end of the connecting block (18). A tapered column (20) with symmetrical distribution and gradually increasing outer diameter is sleeved on the outer wall of the guide rod (19). Two sets of inner support blocks (26) arranged in a ring array are provided on the inner wall of the positioning cylinder (9). A support plate (23) arranged in a ring array is slidably installed on the outer wall of the positioning cylinder (9). A spring (27) is provided between the support plate (23) and the inner support block (26). A brake rod body (6) is sleeved on the outer side of the positioning cylinder (9).
2. The brake lever turning device according to claim 1, characterized in that: One end of the positioning cylinder (9) is tapered, and an assembly groove (12) is provided inside one end of the brake rod body (6). The positioning cylinder (9) is inserted into the assembly groove (12) through the tapered end. An assembly hole (13) is machined inside the brake rod body (6).
3. The brake lever turning device according to claim 1, characterized in that: The mounting bracket (2) has a guide rail (3) on one side of its inner wall, and a support rod (16) is provided at the lower end of the threaded bracket (22). A slider (14) is provided on one side of the lower end of the support rod (16) and is slidably installed inside the guide rail (3).
4. The brake lever turning device according to claim 3, characterized in that: The slider (14) has equidistantly distributed ball bearings (15) mounted on the inner walls of both the front and rear sides. The guide rail (3) has grooves (21) on both the front and rear sides. The ball bearings (15) are rolled and fitted onto the inner wall of the grooves (21). One end of the mounting bracket (2) is equipped with an electromagnetic brake (7) that is sleeved on the outside of the output end of the motor (1).
5. A brake lever turning device according to claim 3, characterized in that: The guide rail (3) and the mounting bracket (2) are provided with symmetrically distributed reinforcing ribs (11). One end of the mounting bracket (2) is provided with a bearing bracket (8). One end of the screw (4) is rotatably installed inside the bearing bracket (8). The mounting bracket (2) is provided with symmetrically distributed mounting grooves (10).
6. The brake lever turning device according to claim 1, characterized in that: The lower end of the support plate (23) is provided with symmetrically distributed positioning tubes (28) located inside the spring (27), and the lower end of the positioning tube (28) is slidably inserted with a positioning rod (29) connected to the inner support block (26).
7. The brake lever turning device according to claim 1, characterized in that: The inner wall of the support plate (23) is provided with two sets of positioning blocks (24), and the inner wall of the positioning blocks (24) is rotatably installed with ball bearings (25) located on the moving path of the cone column (20).